To provide a conversion equipment for a power shaft low-speed drive, capable of holding the backstop of the power shaft, such as a bucket conveyor, and facilitates visual observation of facilities.
Not less than three rollers are interposed in a cylinder part 3 of a cam clutch for backstop of the power shaft 1, one is mounted on a cylinder part 3, and the two are placed in a place for mounting the cylinder part 3. Each roller 4 is supported with two bearing plates, integrally secured with each other, the cylinder part 3 is fitted with clearance for the bearing plates 5, 6; a torque arm 7 is formed in an elongated plate with respect to the bearing plate 5 located outside, a stopper 8 restricting the amplitude of the end part is provided; and a gear 10 or a sprocket having a smaller diameter of a geared motor 9 at lower part of external surface of the bearing plate 5 and a gear 11 having a larger diameter 11 or sprocket at side end of the cylinder part 3 of the cam clutch 2 are coaxially installed and meshed with each other or connected by a chain 12.